Informations of Cr Plating in Trivalent Chromium Electrolytes

Traditional chromium electroplating is carried out in a plating bath containing hexavalent chromium.Hexavalent chromium is very harmful to environment and human health,therefore,research on trivalent chromium plating has been promoted.Comparing with hexavalent chromium plating,trivalent chromium plating has a lot of advantages.Whereas,there are still some problems need to be solved for wide application of trivalent chromium plating,such as that the bath composition is complicated,the plating process is difficult to maintain and control,it is hard to select anode and not easy to thicken coating,surface appearance of coating is not perfect enough,etc.This paper reviews the development of trivalent chromium plating,introduces the current existing problems,and discusses the solutions of the problems and future developing trends.